access of alfreco from outside

Hi there,

I have alfresco-5.0.d Community Version installed on a virtual machine (Ubuntu 14.04.2 LTS (64 bit)) of our server. Now we want to access Alfresco from outside of our company. We opened the firewall for 8080 and we can access the machine (with http://<External-IP> we get default welcome page of ubuntu-apache) but we cannot access Alfresco by http://<External-IP>:8080/share.

Thanks in advance for any help